For
any section, a cable's flexibility depends on the diameter of its
costituent elementary strands. Non-alloyed aluminium wire can easily be
drawn down to 0.3 mm in diameter. The operation is more delicate for
smaller diameters since the breakage rate can become higher. This
problem is solved by using specially designed aluminium alloys. Indeed,
the maximal breaking load of nonb alloyed aluminium is rather low. Hence,
the effort required for passing it in the dies leads to the wire
breaking for the slightest metallurgical flaw. It is therefore
compulsory to use alloys for small sections, preferably the 131050, or a
6101 family alloy. It is just as essential to use a metal free of any
impurities that could render it unfit for drawing. The characteristics
of the strands demanded for use in flexible cables depend on the
conditions of use.
In general though, they should have:
good mechanical properties (breaking load
and elongation)
For
any section, a cable's flexibility depends on the diameter of its
costituent elementary strands. Non-alloyed aluminium wire can easily be
drawn down to 0.3 mm in diameter. The operation is more delicate for
smaller diameters since the breakage rate can become higher. This
problem is solved by using specially designed aluminium alloys. Indeed,
the maximal breaking load of nonb alloyed aluminium is rather low. Hence,
the effort required for passing it in the dies leads to the wire
breaking for the slightest metallurgical flaw. It is therefore
compulsory to use alloys for small sections, preferably the 131050, or a
6101 family alloy. It is just as essential to use a metal free of any
impurities that could render it unfit for drawing. The characteristics
of the strands demanded for use in flexible cables depend on the
conditions of use.